Hi,
I am facing a situation where the mmap fails when two proccess
are trying to access a same shared memory allocated using mmap( the
memory is not private )

this code was working on true 64 but not working on HP-UX, please
provide some link or materials which deals with various
situation( some test code or tutorials) where
-> two proccess are access the same shared memory,
shared
-> two proccess are access the same shared memory,
private
-> the memory is taken from 32 bit addressable region
-> the mempry is mapped protected
etc etc all the possible combination
my code is quite bigger and the debugging becomes quite tough
i want check the situation with smaller code with similar purpose

Some tutorials or test code / some links providing the behaveiour of
mmap at various situation would be highly useful

Best Regards,
Rakesh UV

[ Post a follow-up to this message ]

Rakesh UV wrote:
> Hi,
>        I am facing a situation where the mmap fails when two proccess
> are trying to access a same shared memory allocated using mmap( the
> memory is not private )

IIRC, I don't think HPUX supports mapping to different virtual
addresses.  Could it be possible you're trying to do that ?

[ Post a follow-up to this message ]

Rakesh UV <uvrakesh@gmail.com> writes:
>Hi,
>       I am facing a situation where the mmap fails when two proccess
>are trying to access a same shared memory allocated using mmap( the
>memory is not private )

How does the mmap fail?  Does it return an error code?  If so, which
error code?  Could you include the actual mmap call you are making?
Do you expect MAP_PRIVATE to allow two processes to see the same memory?
Do you specify the address in the process virtual address space on
the mmap call with MAP_FIXED?


scott

[ Post a follow-up to this message ]